COMPUTER SCIENCE AND ENGINEERING
UNIX
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mkdir
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echo
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bc
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ls
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Detailed explanation-1: -The echo command in Linux is used to display a string provided by the user. For example, use the following command to print Hello, World! as the output: echo Hello, World! Note: Using the echo command without any option returns the provided string as the output, with no changes.
Detailed explanation-2: -Echo is a Unix/Linux command tool used for displaying lines of text or string which are passed as arguments on the command line. This is one of the basic command in linux and most commonly used in shell scripts. In this tutorial, we will look at the different options of echo command.
Detailed explanation-3: -In Linux, the echo command can be used for displaying a line of string/text that is passed as the arguments. This command is a built-in that is mostly and widely used in various batch files and shell scripts to outcome status test to a file and screen.
Detailed explanation-4: -The echo command is one of the most basic and frequently used commands in Linux. The arguments passed to echo are printed to the standard output. echo is commonly used in shell scripts to display a message or output the results of other commands.
Detailed explanation-5: -echo $? returns the return value (exit status) of the last executed command (0 is usually success ).